The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
권호 표지
DOI QR코드

DOI QR Code

High Power-Density LDC Design for Ultra-Compact Electric Vehicles

초소형 전기자동차용 고밀도 LDC 설계

  • Kim, Tae-Won (Dept. of Electrical and Electronic Convergence System Engineering. Keimyung University) ;
  • Lee, Jae-Won (Dept. of Electrical and Electronic Convergence System Engineering. Keimyung University) ;
  • Kim, Jun-Min (Dept. of Mechanical Systems Engineering Electronics, Hansung University) ;
  • Kim, Gu-Yong (MDM Inc.) ;
  • Kim, Jun-Ho (Dept. of Electrical Energy Engineering. Keimyung University)
  • Received : 2020.11.01
  • Accepted : 2020.12.24
  • Published : 2021.06.20
Download PDF
⟨ Previous Next ⟩

Abstract

Ultra-compact electric vehicles have narrow space for power conversion devices. This work presents schemes to achieve the high-power density of a low-voltage DC-DC converter (LDC): simplifying a converter structure by using sync-buck topology, applying a planar inductor using PCB winding, and applying a plate-type heat sink. The heat sink is placed between two PCBs, which increases the contact surface between the PCB and the heat-dissipating device. It enables the miniaturization of the converter to improve the conditions of heat radiation. The validity of the proposed scheme is verified through the experiment using a 500 W(12 V, 41.67 A) prototype with an input voltage range from 58 V to 84 V.

Keywords

Acknowledgement

본 연구는 대구광역시 미래형자동차 선도 기술 개발사업의 지원으로 수행되었습니다. (과제번호: DG-2017-06)

References

  1. J. Park, "International green house gas emission regulations for vehicles," Journal of the Korean Society of Automotive Engineers, Vol. 42, No. 6, pp. 26-30, Jun. 2020.
  2. J. Kim, W. Lee, S. Kim, S. Ha, and S. Kim, "High-efficiency two-stage LDC design for HEV/PHEV," The Korean Society Of Automotive Engineers, pp. 1879-1886, May 2013.
  3. Y. S. Kim, C. Y. Oh, W. Y. Sung, and B. K. Lee, "Topology and control scheme of OBC-LDC integrated power unit for electric vehicles," IEEE Transactions on Power Electronics, Vol. 3, No. 3, pp. 1731-1743, Mar. 2017.
  4. H. S. Kim, J. H. Jeon, H. J. Kim, and J. S. Ahn, "A study on OBC integrated 1.5 LDC converter for electric vehicle," Journal of Korea Institute of Information, Electronics, and Communication Technology, Vol. 12, No. 4, pp. 456-465, Aug. 2019. https://doi.org/10.17661/JKIIECT.2019.12.4.456
  5. H. B. Kim and J. S. Kim, "Implementation of high-efficiency 1.5kW LDC for xEV using GaN HEMT," The Transactions of The Korean Institute of Electrical Engineers, Vol. 69, No. 2, pp. 276-282, Feb. 2020. https://doi.org/10.5370/kiee.2020.69.2.276
  6. M. H. Shin, T. H. Eom, J. M. Kim, J. Lee, S. H. Kim, Y. S. Lee, and C. Y. Won, "Optimal design of high efficiency distributed LDC power supply," Journal of the Korean Institute of Illuminating and Electrical Installation Engineers, Vol. 31, No. 4, pp. 57-64, Apr. 2017. https://doi.org/10.5207/JIEIE.2017.31.4.057
  7. J. H. Lee, J. Y. Oh, K. Y. Kim, D. H. Park, H. J. Kim, J. S. Won, and J. H. Kim, "A study on the characteristics analysis of PCB heat dissipation of high density LDC module suitable for eco-friendly electric vehicle," in The Korea Institute of Power Electronics Annual Conference, pp. 271-272, Jul. 2019.